distal germline variant
Variations in the progression of the lineages that gives rise to all germ cells, lying in the region adjacent to the proximal gonad (on the side furthest from the founder cells of the somatic gonad), over time compared to control animals.
male sex muscle morphology variant
Any variation in the form, structure or composition of the muscles of the adult male reproductive system compared to control. In C. elegans males, the M myoblast gives rise to a much larger set of specialized muscles, compared to hermaphrodites, which differentiate within the tail region (Wormatlas).